Gas mixing unit



April 13, 1937. T. AL SALA GAS MIXING UNIT 2 Sheets-Sheet 1 Filed April 6, 1934 hm @Rblbl ,Mlm

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April 13, 1937. T. A.'sA| A GAS MIXING UNIT Filed Aprii e, 1934 2 Sheets-SheetR INVENTOR 0 shown connected to a gas container,

Patented Apr. 13, 1937 UNITEo fsTT-as i wie GAS MIXING-SUM T; Y" Theodore.A. Salapallas,'fex. Application Aprile weg-seria; 'Na-71ans aol'aims.. (Chief This invention appertains to novel; serviceable Suitably mounted Au'ponfth'ek central housing Ill and advantageous improvementsin mixing de- Yvices and in such connection' the invention relates `more particularly to av device for mixing predetermined amounts of gas and air.

A primary object of the invention is the provision of means whereby combustible gas and air are continuously so commingled as to provide a uniform, combustible mixture which may be used for heating or illuminating purposes. v

Another object of the invention is to provide a device which is actuated by the pressure` of .the

gas delivered to the unit. "i Another object of the invention is' the pr vi' sion of means whereby the device is rende ed wholly automatic in its operation j f f A further Objectis to provide aninventionjof the type described which is of simple and durable construction, of positive and accurateactionjzbf inexpensive original cost, and which is thoroughlyl zo dependable in use.

A construction designed to eiectuatethe Vin Vention will be hereinafter described, together with other novel features of the invention.'`

The invention will be more readily comprehended from a perusal of the followingdetailed specification and by reference toi the accompany:- ing drawings, in which a suitableexemplication of the invention is depicted, and wherein: Figure 1 is an end elevation of theinvention Figure 2 is a view taken on the line 24 -2 Yof Figure l,

Figure 3 is an enlarged view taken onthe' line 3--3 of Figure 2, Figure 4 is a longitudinal view partially in elevation,

Figure 5 is a View on the line 5 5 of Figure 9, Figure 6 is an enlarged perspective View of the base portion of the valve mechanism, showing the passag'eways to the gas chambers,

Figure 7 is a perspective view of the bellows, shown connected with component parts.

Figure 8 is an elevational view of the valve crank arm, and Figure 9 is a plan view of the valve mechanism. In the drawings, wherein like characters of reference are employed to designate corresponding parts or portions throughout the several views, the numeral II) designates. a central housing, which is provided with integral cylinders vII and I2 respectively. Transverse partitions I3 and I4 serve to divide the interior of the unit into compartments as shown in Figure 4. The entire structure is supported upon a suitable base I5.

mental ports 41, 48, and 49 .are arranged. The

.isa smaller'housingl 6, which serves to house .the

valve mechanism which is comprised of aV base portion I 'I and a valvecap'l. A partition or web I9 serves to divide the .interior of the housing IB into an inletchamb'er 28 and exhaust chamber 5 y2l. `An inletconnection 22 communicates with the inlet chamber 120, and an exhaust connection '23 communicates'with the exhaust chamber 2|.

.',The space the central housing I0 and the cylinders j Iflfan'd v.I2 are divided by a plurality of l0 bellows,"sh ownjin Figures 4 and7. A bellows 24 constructedof leather orgother suitable material,

`servesto divide the Aspace within the cylinder I'I 'into airchambersfz and326. Withinthe central i housing Ill a Fairlof bellows v2.I and 28 are posi- 15 'tfonedlas shown injlllgur 4,1 These bellowsfserve referenties. elas'cnainber. y 30 and.,211."gfas1`cliafrnberfI. A bellows-32 divides a centralgas chamber thespace within,` the'cylinder I2 into air chamberfs as:y maca., c zo The specicibellows 'construction is best shown in Figure 7. .'Ifhebellows 24 andrZ'I are connected bya rod 35, which is soconnected to the bellows as tmp'ermit of alignment of the rod 35 withits opening in thepartition I3. 25

Similarly thebellows 28 and32 are connected by a rod 35. The bellows 21 and 28, however, are

unit `38l and a link "4Il'islhi`g'edly connected to the bellows 28. 35

A valve crank arm 4 I, shown in detail in Figure 8 serves to hingedly connect the links 39 and 40. The arm 4I is constrained against downward movement by a collar 42 positioned above the web 43 within the valve base I'I. It will be seen 40 that the arm 4I is provided with a lower crank 44 and an upper crank 45 which is pointed as shown in Figure 8. The apex of the central portion of the valve cap I8 rests upon the point of the upper crank 45. The arm 4I is vertically adjusted so 45 that the lower or vhorizontally flared portion 46 rests upon the upper periphery of the base I'.

Referring to Figure 6, it will be seen that equispaced around the circular base I1, three segport 41 communicates with the gas chamber 29 through the passageway 50, and the port 48 communicates with the gas chamber 3| through the passageway 5I.

'Ihe port 49 and the openings 55 within the circular base I1 all communicate directly with the central gas chamber 30. 'I'he exhaust chamber 2| also is open to the chamber 30 through the port 52, shown only in Figure 3. 5 The operation of the device is as follows: Combustible gas is delivered to the unit from a storage tank (a) or other source, through a pres--V sure regulating valve (b), shown only in Figure 1. The gas enters the .inlet chamber 2,9 through .the inlet connection 22, as shown in Figure'l Assume that the valve mechanism is in the position shown in Figure 9, that is with the valve cap 1,8K4 so displaced by the crank 45 that the port'ilA Ais open, gas is then free to flow into the hmber 29 through the passageway 50. The gaspressure within the chamber 29 then forces the bel lows assembly to the right, (Figur-C 4). valve crank 4I is thereby rotated through the medium of the linkage arrangement. V"Referring to Figure 9 it will beseen ,that the yalve cap I8 is always in eccentric relationship to tin-1.1311- cular base -I 'I, and moves .thereover .as constrained by the crank arm 45.

Referring to Figure 4itwill be seen that gas withinv the chamber 3| isy free .to flow into the exhaust chamber 2|. Its travel is Yupward through port 48, over the upper rim of the base portion II, downward and thence into the exhaust chamber 2I through port 52. As .the cap 30 I8 continues to rotate, port 48 is vopenedto the incoming gas, ports 4I and 491 being v closed thereto. Gas then flows downward through' port 48, through passageway 5I into chamber 3lI. A YPrssure within this chamber Vforces the bellows .assembly to the left in Figure 4, thereby continuing rotation of the valve cap. I8. Gas within chamber 29 now ilows back through passage 5I! upward through port 4`I, overthe rim of the ring I 'I and thence downward-.to the chamber .36, from 40 which it is free to flow to the exhaust chamber 2|. The next port to `beopened to the incoming lgas is the port 4,9, which it will be remembered communicates with the chamber 30. The Kpurpose of opening this port Afor V,a short period durf ing each cycle is to smooth .out the laction n f the mechanism. l

The length adjusting unit 38 is for the purpose of so adjusting the relative lengths of the links 31 and 39 to the length of thelink 4.0 :that a dead center is eliminated, thereby always assur.-

ing the starting of the 4device as lsoon as gas Pressure is applied thereto..

As the bellows mechanism reeiprocates as above described, the bellows 24 .and A32 are simul- The taneously moved, thus pumping a predetermined amount of "air into the mixing line. 'I'his is accomplished as follows: As the mechanism moves to the right, air is drawn into chamber 25 through a check valve 53 and simultaneously into chamber 33 through a check valve 54. As this takes place, air within chamber 26 is expelled through pipe 55, check valve 56, pipe 51 and outlet 58. Also air invchamber 34 is expelled through pipe 5 9, check valve 6I), pipe 6I and outlet 58.

On the return stroke air is drawn into chamber 34 through check valve 62, and into chamber '26 through check valve 63. At the same time air 'is expelled from chamber 25 through pipe 64, check yalve 65, and pipe 66 and outlet 58. lAlso air -is expelled from chamber 33 through check valve `67, pipe 68 and outlet 58.

As shown in Figure 1 the gas exhaust connection 23 is -directly connected to the outlet 58, thereby Venabling gaspassing through the outlet 23 to .be commingled with air pumped .thereto in predetermined quantities as above described. K Manifestly, various changes `in the size and shape of the different parts as rwell as modications .and alterations may be made within the ,spirit .of the invention and-the scope of the ap pended claims.

vHaving now described my invention and explained its uses and operation, what I claim for my invention and desire broadly covered and protected by United States Letters Patent is:

1.'A gas and air mixing unit, including expansible gas and .air chambers, valve means for :admitting air; to said chambers and axially aligned and interconnected bellows means for vexpelli ng .air therefrom, a rotary valve in controlof openings to said gas chambers, means actated by the connections between said bellows for rotating Said valvaand bellows means for expelling gas from said gas chambers, and means for ,commingling the air. from said air chambers, 

